chilLED: water cooled, ducted, or active led fixture

BOBBY_G

BOBBY_G

Well-Known Member
Growmau5 said:
IF you check out his website, he is already offering the light engine as a "DIY part" which demonstrates a certain open source mentality. I am getting some good vibes from the way this guy makes videos and answers comments with hard answers.
-although his light engine does not interest me that much, his cases do!
-perhaps if we embarrassed him and his efforts, he would offer the case and heatsink platform to us DIY guys?!
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why dont we try to conenct with him and just start building and mailing him off the wall cob designs for him to test in his integrating sphere. youre gonna be hard pressed to compete with him on fit and finish type stuff, but lets just send him a simple waterblock design with 4 CD bins and some simple optics options that he can run at various currents and water temps in his sphere?
 
nevergoodenuf

nevergoodenuf

Well-Known Member
I like your thinking Bobby, but you got one thing backwards. Setup the fans so the water doesn't flow until the room is at temp, then use the water flow to maintain room temperature.
 
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BOBBY_G

BOBBY_G

Well-Known Member
nevergoodenuf said:
I like your thinking Bobby, but you got one think backwards. Setup the fans so the water doesn't flow until the room is at temp, then use the water flow to maintain room temperature.
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another excellent example. heat your res, etc. external intermediate buffer tanks or heat exchangers at different temps with independent coils in them for moving that cool/warm liquid to any number of applications. hydronics 101. NOS brazed plate heat exchangers are cheap as hell on ebay if youre not picky about size or dimension
 
JorgeGonzales

JorgeGonzales

Well-Known Member
Growmau5 said:
@DISTRESS0R well, I like to keep an open mind about new products. Lumileds are not really impressive on paper, especially when some cxb3590 users are getting 2.6-2.7 µmol/J .
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Are they though? We should have the answer soon with PLC ETL testing, but the only way we are hitting those numbers right now is by trusting Supra's spreadsheets implicitly. Although my money is on yes, we are hitting them, because Supra's choices have been logical and indirectly tested every step of the way.

Reminds me of a conversation on IC between Supra and Beta Test Team about this very issue. Get it in a sphere, etc.

These light engines have individual red/blue channels though, yeah? So more flexible than cobs, programmable spectrums. Worth it, I dunno. Cool as hell though.

Oh, and ground cooling is an awesome idea.
 
BOBBY_G

BOBBY_G

Well-Known Member
one other rule of thumb for DIY heat exhangers: its all about surface area. i built a copper tube heat exchanger out of 16 5' lengths of 1/2" type L matrixed together in a square.

surface area is function of circumferance and multiple 1/2" pipes have twice the surface area of a 1" pipe which physically occupies similar volume.
 
nevergoodenuf

nevergoodenuf

Well-Known Member
I'm not playing with those puny little CXB3590's either:bigjoint:, I got the real high power shit:weed:. Ok, I know that the Luna's are nowhere near as efficient as the CXB, but the Citizens get close. One of my first builds was a water cooled fixture ( it blew up), I couldn't wait for my heat sinks to get here, so I ran to Fry's and made this. I still like the concept of having smaller fans on the fixture blowing air thru the canopy at a fraction of the cost of multiple wall fans. Over 700 watts of cooling power for 660 watts of LED. When switching over to 240v, I forgot to plug in the fans and pump system. BOOM.
IMG_20151231_154731804.jpg IMG_20151231_154828332_HDR.jpg
 
Trippyness

Trippyness

Well-Known Member
I would also like to see COBS in a sphere and get some actual data rather than SupraSPL spreadsheets. Just to confirm. On a side note SMD Single diodes are very efficient and can be just as efficient if you can get a good price on them. The new xp-g3 will be out soon and has killer specs. COBS are great but would love to see some sphere data to back up the datasheets. There is a reason this guy went with luxeon.
 
welight

welight

Well-Known Member
Trippyness said:
I would also like to see COBS in a sphere and get some actual data rather than SupraSPL spreadsheets. Just to confirm. On a side note SMD Single diodes are very efficient and can be just as efficient if you can get a good price on them. The new xp-g3 will be out soon and has killer specs. COBS are great but would love to see some sphere data to back up the datasheets. There is a reason this guy went with luxeon.
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xpg3 is out already
Cheers
Mark
 
welight

welight

Well-Known Member
August 18 last year so probably have a newer model out now, maybe, Cree MKR nice leds but not cutting edge.
If you guys are interested in sending a unit to Cree
questions
how to fund it, Tempo is around USD1500 for the test, crowd fund it?
what results do you want, LER, QER, PPFD???
what kind of base unit to test. A 4 up module with 1400 ma driver?
I can arrange it just a question of what generic light setup will deliver the best results, data wise for everyone
Cheers
Mark
 
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